From afournier@cmu.edu Sat Apr 09 00:33:19 1994 Path: ashpoly!cascade!mxgate!coyoacan!cmu!afournier From: afournier@cmu.edu (Andrei Fournier) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr09.003319.1851@cmu.edu> Date: Sat, 09 Apr 1994 00:33:19 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Andrei Fournier *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From dkang@pipeline.com Mon Apr 11 04:33:19 1994 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!dkang From: dkang@pipeline.com (Dong-hyun Kang) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr11.043319.6288@pipeline.com> Date: Mon, 11 Apr 1994 04:33:19 GMT References: <1994Apr09.003319.1851@cmu.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Apr09.003319.1851@cmu.edu>, afournier@cmu.edu (Andrei Fournier) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Dong-hyun Kang -- The Pipeline Internet Network "Tape doesn't lie at 02:14. Ears do."